Improved digital speckle correlation method and its application in copper thin film

Huaiwen Wang; Yilan Kang

doi:10.1117/12.468807

29 May 2002 Improved digital speckle correlation method and its application in copper thin film

Huaiwen Wang, Yilan Kang

Proceedings Volume 4537, Third International Conference on Experimental Mechanics; (2002) https://doi.org/10.1117/12.468807
Event: Third International Conference on Experimental Mechanics, 2002, Beijing, China

Abstract

The digital speckle correlation method (DSCM) is a rapidly developing technique of photomechanics. It has been used to measure the surface deformation for its advantages of non- contact, real time, whole field and direct measurement. In this paper, an algorithm is proposed by introducing optimization theory into DSCM. In the improved DSCM, the 1D search determines the step size of iteration, and the inverse matrix of second- order derivative matrix of correlation function is calculated by the quasi-Newton method. By the improvement, the computational; workload is reduced and the convergence velocity is improved. This paper also illustrates the application of digital speckle correlation method in experimental fracture analysis of copper film. Experimental results show that the improved DSCM is an efficacious test techniques in studying the fracture behavior of thin film materials.

Citation Download Citation

Huaiwen Wang and Yilan Kang "Improved digital speckle correlation method and its application in copper thin film", Proc. SPIE 4537, Third International Conference on Experimental Mechanics, (29 May 2002); https://doi.org/10.1117/12.468807

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available